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Gravity
Test Description: Gravity Review Questions!
Instructions: Answer all questions to get your test result.
1) Why does the Moon orbit the Earth?
A
The velocity of the Moon in orbit is faster than the velocity of Earth in orbit around the Sun.
B
The Moon is less dense than Earth.
C
The Moon came into orbit around Earth after Earth was established.
D
The mass of Earth is much greater than the Moon.
2) If the Moon moved farther away from Earth, what would happen to the gravitational force between Earth and the Moon?
A
The force would decrease by the inverse square of the distance.
B
The force would increase proportional to the distance.
C
The force would decrease proportional to the distance.
D
The force would increase by the inverse square of the distance.
3) What is the formula for the law of universal gravitation?
A
Force = G * mass1 * mass2 * distance2
B
Force = G * mass1 * mass2 / distance
C
Force = G * mass1 * mass2 / distance2
D
Force = G * mass1 * mass2 * distance
4) If two asteroids moved closer together, what would be the result on the gravitational force each asteroid exerts on the other?
A
The gravitational force would decrease.
B
None of these
C
The gravitational force would remain the same.
D
The gravitational force would increase.
5) Which of Kepler's laws gave Newton the idea about gravitational force and how it is related to distance?
A
law of relativity
B
law of ellipses
C
law of equal areas
D
law of universal gravitation
6) Which of the following BEST describes the term terminal velocity
A
the density of the air around an object
B
the temperature of the air around a moving object
C
the force of the air pushing on a moving object
D
the weight of the air pushing down on an object
7) Terminal velocity is the velocity of _______
A
a falling object when it starts to break apart
B
an object falling in a vacuum (an environment without air)
C
an accelerating object when it hits the ground
D
a falling object if the force of air resistance equals the force of gravity
8) In a vacuum (an environment without air), what will happen when two objects with different mass are dropped at the same time from the same height?
A
The more massive object lands first.
B
There is no way to test this condition.
C
They both land at the same time.
D
The less massive object lands first.
9) Which factor increases the air resistance on an object?
A
more surface area facing the force of air
B
decreasing air pressure
C
decreasing the density of the object
D
less surface area facing the force of air
10) Which of the following is a true statement about objects in a vacuum?
A
Both a feather and a bowling ball can’t fall, but will always remain motionless.
B
A feather will fall slower than a bowling ball.
C
A feather will fall faster than a bowling ball.
D
A feather and a bowling ball will fall at the same rate.
*select an answer for all questions
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